Hawks Motorsports offers our clients this PS4272 GM Small Block Compatible 427 c.i. Pro-Series Short Block Engine, Forged Rotating Assembly, by BluePrint Engines as a premium foundation for high-performance street, drag racing, autocross, and custom engine builds requiring exceptional strength and durability.

The BluePrint Engines PS4272 is built around a new high-strength cast iron block manufactured and machined in the USA. It features a forged rotating assembly including a forged 4.000-inch stroke crankshaft, forged 6.000-inch H-beam connecting rods, and forged 20cc dished pistons. The block incorporates splayed 4-bolt main caps, a one-piece rear main seal, passenger-side dipstick provision, mechanical fuel pump provision, and is internally balanced front and rear for smooth, reliable operation at high engine speeds.

With a 4.125-inch bore and 4.000-inch stroke, this 427 cubic inch short block provides an outstanding platform for custom cylinder head, camshaft, induction, and ignition combinations. The 10.0:1 compression ratio is achieved when paired with compatible 64cc combustion chamber cylinder heads. Whether you're assembling a naturally aspirated street machine or a dedicated competition engine, the PS4272 offers the strength and precision expected from BluePrint Engines' Pro-Series lineup.

Key Features

• SKU: PS4272
• GM Small Block Compatible 427 c.i. Pro-Series Short Block
• BluePrint Engines high-strength cast iron block
• Manufactured and machined in the USA
• 427 cubic inch displacement
• 4.125-inch bore
• 4.000-inch forged steel crankshaft
• Forged 6.000-inch H-beam connecting rods
• Forged 20cc dished pistons
• 10.0:1 compression ratio with 64cc cylinder heads
• Splayed 4-bolt main block
• One-piece rear main seal
• Internally balanced front and rear
• Passenger-side dipstick provision
• Mechanical fuel pump provision
• Drilled and tapped for clutch linkage
• Designed for roller camshaft applications
• Ideal for high-performance street, drag racing, autocross, and custom performance builds

Fitment Applications

Compatible with many vehicles utilizing a traditional GM Small Block Chevrolet engine architecture when the appropriate external components are selected.

Chevrolet Camaro

• 1967 Chevrolet Camaro
• 1968 Chevrolet Camaro
• 1969 Chevrolet Camaro
• 1970 Chevrolet Camaro
• 1971 Chevrolet Camaro
• 1972 Chevrolet Camaro
• 1973 Chevrolet Camaro
• 1974 Chevrolet Camaro
• 1975 Chevrolet Camaro
• 1976 Chevrolet Camaro
• 1977 Chevrolet Camaro
• 1978 Chevrolet Camaro
• 1979 Chevrolet Camaro
• 1980 Chevrolet Camaro
• 1981 Chevrolet Camaro

Pontiac Firebird

• 1967 Pontiac Firebird
• 1968 Pontiac Firebird
• 1969 Pontiac Firebird
• 1970 Pontiac Firebird
• 1971 Pontiac Firebird
• 1972 Pontiac Firebird
• 1973 Pontiac Firebird
• 1974 Pontiac Firebird
• 1975 Pontiac Firebird
• 1976 Pontiac Firebird
• 1977 Pontiac Firebird
• 1978 Pontiac Firebird
• 1979 Pontiac Firebird
• 1980 Pontiac Firebird
• 1981 Pontiac Firebird

Verify fitment before ordering, especially when using aftermarket engine mounts, transmission adapters, oil pans, headers, or modified chassis components.

Installation Notes

• Includes assembled short block only.
• Cylinder heads are not included.
• Camshaft, lifters, timing set, intake manifold, oil pan, timing cover, harmonic balancer, water pump, ignition system, flywheel/flexplate, valve covers, fuel system, and accessory drive components are not included unless otherwise specified.
• Compression ratio is based on the use of compatible 64cc cylinder heads.
• Use a non-weighted harmonic balancer and non-weighted flywheel or flexplate.
• Recommended fuel is 91 octane or higher when assembled as specified.
• Verify all component compatibility before final assembly.
• Test fit all external components before final installation.
• Do not modify, paint, or install components until fitment has been confirmed.
• Short blocks carry the manufacturer's published short block warranty.